somehow my ipod ****** up

last night i tried to download a app from cydia that allowed me to put the icons wherever you want. Afterwards it Reloaded infinityyyyyyyyyyyy and then the "Connect to iTunes crap" came. Today i tried to rehack it with blackra1n but only that picture of the guy comes and then for a min it stays like that and then the Reloading Sign comes and then blackra1n starts again and the whole Process beginns from the beginning again.

I have 3.1.2 and i have 2g ipod touch "MC" hacked with blackra1n.


And I also want to update to 4.0 afterwards, but it doesnt seem to work because of 3004 Error :/

Help me or im gonna restore my ipod to 4.2 :/

omg help me please